As The Washington Post reported this weekend, beyond the new "speed on green" cameras, the mayor's plan includes "new laser-equipped cameras that could operate in tunnels. Gray is also proposing pilot enforcement programs targeting pedestrians and drivers who 'block the box.'"

While critics of speed cameras say D.C.'s aggressive use of automated traffic enforcement is just meant to increase revenue, the mayor and police officials stress that it's in the name of safety and that the cameras have prompted drivers to slow down.

Gray will testify before the D.C. Council on Tuesday about his budget proposal, which would raise $30 million in new traffic fines for the city.

D.C. Councilmember Phil Mendelson (D-At-Large), who chairs the Judiciary Committee, told WRC-TV/NBC4 that the city "should not be balancing budgets based on ticket writing. Ticket writing should be based on public safety," noting that speeding is a legitimate enforcement issue.